Technical and Financial Feasibility Study Inactive Geothermal Well for Electricity Generation in Flores Indonesia

The Flores Geothermal Power Plant, located on Mount Poco Leok in East Nusa Tenggara, Indonesia, can produce up to 10 MW of electricity, but its current status is only 8 MW. With three production wells available, only the second well (U-02 well) is active to generate electricity, while the inactive U-01 well has a downhole problem and the U-03 well has technical evaluations. The scope of this article is to discuss technical analysis of U-02 and U-03 well pressure connectivity, well flow simulations, scaling analysis, pipeline layout, and heat and pressure loss piping modeling. Financial analysis to estimate pipeline construction costs and project cash flow upon U-03 well utilization. The analysis of minerals that cause scaling will be discussed in this article. Heat loss and pressure drop piping modeling for 118.4 m of steam pipe, from U-03 to the back pressure unit, considers insulation and fittings, and shows little heat loss of 25,428 kJ/h. The final result, if well activated will generate 1.4 MW of electricity, and it will generate a revenue net cash flow of USD 432,602.01 over 20 years.